Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements.
(A) Wings of butterfly and birds look alike and are the results of i evolution.
(B) Miller showed that `CH_(4), H_(2),NH_(3)` and i when exposed to electric discharge in a flask resulted in formation of ii
(C) Vermiform appendix is a i organ and an ii evidence of evolution.
(D) According to Darwin, evolution took place due to i and ii or the fittest.

Options

A. (D)-i-Small variations, (ii) Survival.
(A)-i-Convergent
B. (A)-(i) Convergent,
(B) -i-Oxygen, ii-nucleosides
C. (B)-i-Water vapour,ii-Amino acids
(C)-i-Rudimentary,ii-Anatomical
D. (C)-i-Vestigial,ii-Anatomical
(D)-(i) Multiplication.

Answer

To solve the question, we need to fill in the blanks for each of the four statements (A-D) with the correct terms related to evolution. Let's go through each statement step by step.

### Step-by-Step Solution:

**Statement A:**
- The wings of butterfly and birds look alike and are the results of **i** evolution.
- The correct term to fill in the blank is **convergent** evolution. This is because the wings of butterflies and birds serve a similar function (flight) but evolved independently from different ancestral origins.

**Statement B:**
- Miller showed that `CH₄, H₂, NH₃` and **i** when exposed to electric discharge in a flask resulted in formation of **ii**.
- The first blank can be filled with **water vapour** (H₂O), which was part of Miller's experiment. The second blank can be filled with **amino acids**, which were formed as a result of the experiment.

**Statement C:**
- Vermiform appendix is a **i** organ and an **ii** evidence of evolution.
- The first blank should be filled with **vestigial** organ, as the vermiform appendix is a remnant of a structure that had a function in ancestral species. The second blank can be filled with **anatomical** evidence of evolution, as it provides insight into evolutionary relationships.

**Statement D:**
- According to Darwin, evolution took place due to **i** and **ii** or the survival of the fittest.
- The first blank can be filled with **small variations**, which refers to the minor changes that occur in organisms. The second blank can be filled with **survival of the fittest**, which is a key concept in Darwin's theory of natural selection.

### Final Answers:
- (A) Convergent evolution
- (B) Water vapour, Amino acids
- (C) Vestigial, Anatomical
- (D) Small variations, Survival of the fittest